ChatGPT refusing to leave this phrase out of responses

I’m not sure if it has always been this way, but i just noticed how ChatGPT voice mode includes the phrase “just let me know” at the end of almost all its responses. It was really starting to annoy me, so i asked it to stop saying that. And this thing had the audacity to respond with “Got it! I’ll keep it out of my responses from now on. Thanks for the feedback, and I appreciate you helping me improve. Let me know if there’s anything else I can do!”

I kept telling it over and over to stop saying it and it just repeatedly told me it would stop, only to add “just let me know” or some other variation of it at the end of the response! Tbis is why I never use this stuff.